|
0
|
1
|
|
|
2 /*
|
|
|
3 * Copyright (C) Igor Sysoev
|
|
660
|
4 * Copyright (C) Nginx, Inc.
|
|
0
|
5 */
|
|
|
6
|
|
|
7
|
|
|
8 #include <ngx_config.h>
|
|
|
9 #include <ngx_core.h>
|
|
|
10
|
|
|
11
|
|
|
12 /*
|
|
112
|
13 * The time may be updated by signal handler or by several threads.
|
|
|
14 * The time update operations are rare and require to hold the ngx_time_lock.
|
|
|
15 * The time read operations are frequent, so they are lock-free and get time
|
|
|
16 * values and strings from the current slot. Thus thread may get the corrupted
|
|
|
17 * values only if it is preempted while copying and then it is not scheduled
|
|
|
18 * to run more than NGX_TIME_SLOTS seconds.
|
|
0
|
19 */
|
|
|
20
|
|
112
|
21 #define NGX_TIME_SLOTS 64
|
|
0
|
22
|
|
270
|
23 static ngx_uint_t slot;
|
|
112
|
24 static ngx_atomic_t ngx_time_lock;
|
|
0
|
25
|
|
112
|
26 volatile ngx_msec_t ngx_current_msec;
|
|
|
27 volatile ngx_time_t *ngx_cached_time;
|
|
|
28 volatile ngx_str_t ngx_cached_err_log_time;
|
|
|
29 volatile ngx_str_t ngx_cached_http_time;
|
|
|
30 volatile ngx_str_t ngx_cached_http_log_time;
|
|
616
|
31 volatile ngx_str_t ngx_cached_http_log_iso8601;
|
|
0
|
32
|
|
566
|
33 #if !(NGX_WIN32)
|
|
|
34
|
|
|
35 /*
|
|
670
|
36 * localtime() and localtime_r() are not Async-Signal-Safe functions, therefore,
|
|
566
|
37 * they must not be called by a signal handler, so we use the cached
|
|
|
38 * GMT offset value. Fortunately the value is changed only two times a year.
|
|
|
39 */
|
|
|
40
|
|
|
41 static ngx_int_t cached_gmtoff;
|
|
|
42 #endif
|
|
|
43
|
|
112
|
44 static ngx_time_t cached_time[NGX_TIME_SLOTS];
|
|
|
45 static u_char cached_err_log_time[NGX_TIME_SLOTS]
|
|
|
46 [sizeof("1970/09/28 12:00:00")];
|
|
|
47 static u_char cached_http_time[NGX_TIME_SLOTS]
|
|
|
48 [sizeof("Mon, 28 Sep 1970 06:00:00 GMT")];
|
|
|
49 static u_char cached_http_log_time[NGX_TIME_SLOTS]
|
|
|
50 [sizeof("28/Sep/1970:12:00:00 +0600")];
|
|
616
|
51 static u_char cached_http_log_iso8601[NGX_TIME_SLOTS]
|
|
|
52 [sizeof("1970-09-28T12:00:00+06:00")];
|
|
0
|
53
|
|
|
54
|
|
|
55 static char *week[] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
|
|
|
56 static char *months[] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun",
|
|
|
57 "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
|
|
|
58
|
|
50
|
59 void
|
|
|
60 ngx_time_init(void)
|
|
0
|
61 {
|
|
|
62 ngx_cached_err_log_time.len = sizeof("1970/09/28 12:00:00") - 1;
|
|
|
63 ngx_cached_http_time.len = sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1;
|
|
|
64 ngx_cached_http_log_time.len = sizeof("28/Sep/1970:12:00:00 +0600") - 1;
|
|
616
|
65 ngx_cached_http_log_iso8601.len = sizeof("1970-09-28T12:00:00+06:00") - 1;
|
|
0
|
66
|
|
|
67 ngx_cached_time = &cached_time[0];
|
|
|
68
|
|
566
|
69 ngx_time_update();
|
|
0
|
70 }
|
|
|
71
|
|
|
72
|
|
112
|
73 void
|
|
566
|
74 ngx_time_update(void)
|
|
0
|
75 {
|
|
616
|
76 u_char *p0, *p1, *p2, *p3;
|
|
112
|
77 ngx_tm_t tm, gmt;
|
|
566
|
78 time_t sec;
|
|
|
79 ngx_uint_t msec;
|
|
112
|
80 ngx_time_t *tp;
|
|
|
81 struct timeval tv;
|
|
0
|
82
|
|
112
|
83 if (!ngx_trylock(&ngx_time_lock)) {
|
|
0
|
84 return;
|
|
|
85 }
|
|
|
86
|
|
566
|
87 ngx_gettimeofday(&tv);
|
|
112
|
88
|
|
566
|
89 sec = tv.tv_sec;
|
|
|
90 msec = tv.tv_usec / 1000;
|
|
112
|
91
|
|
|
92 ngx_current_msec = (ngx_msec_t) sec * 1000 + msec;
|
|
|
93
|
|
|
94 tp = &cached_time[slot];
|
|
0
|
95
|
|
112
|
96 if (tp->sec == sec) {
|
|
262
|
97 tp->msec = msec;
|
|
112
|
98 ngx_unlock(&ngx_time_lock);
|
|
|
99 return;
|
|
|
100 }
|
|
0
|
101
|
|
282
|
102 if (slot == NGX_TIME_SLOTS - 1) {
|
|
262
|
103 slot = 0;
|
|
|
104 } else {
|
|
|
105 slot++;
|
|
|
106 }
|
|
|
107
|
|
|
108 tp = &cached_time[slot];
|
|
|
109
|
|
112
|
110 tp->sec = sec;
|
|
262
|
111 tp->msec = msec;
|
|
112
|
112
|
|
|
113 ngx_gmtime(sec, &gmt);
|
|
0
|
114
|
|
|
115
|
|
280
|
116 p0 = &cached_http_time[slot][0];
|
|
0
|
117
|
|
112
|
118 (void) ngx_sprintf(p0, "%s, %02d %s %4d %02d:%02d:%02d GMT",
|
|
|
119 week[gmt.ngx_tm_wday], gmt.ngx_tm_mday,
|
|
|
120 months[gmt.ngx_tm_mon - 1], gmt.ngx_tm_year,
|
|
|
121 gmt.ngx_tm_hour, gmt.ngx_tm_min, gmt.ngx_tm_sec);
|
|
0
|
122
|
|
18
|
123 #if (NGX_HAVE_GETTIMEZONE)
|
|
0
|
124
|
|
112
|
125 tp->gmtoff = ngx_gettimezone();
|
|
|
126 ngx_gmtime(sec + tp->gmtoff * 60, &tm);
|
|
0
|
127
|
|
18
|
128 #elif (NGX_HAVE_GMTOFF)
|
|
0
|
129
|
|
112
|
130 ngx_localtime(sec, &tm);
|
|
566
|
131 cached_gmtoff = (ngx_int_t) (tm.ngx_tm_gmtoff / 60);
|
|
|
132 tp->gmtoff = cached_gmtoff;
|
|
0
|
133
|
|
|
134 #else
|
|
|
135
|
|
112
|
136 ngx_localtime(sec, &tm);
|
|
566
|
137 cached_gmtoff = ngx_timezone(tm.ngx_tm_isdst);
|
|
|
138 tp->gmtoff = cached_gmtoff;
|
|
0
|
139
|
|
|
140 #endif
|
|
|
141
|
|
|
142
|
|
280
|
143 p1 = &cached_err_log_time[slot][0];
|
|
0
|
144
|
|
112
|
145 (void) ngx_sprintf(p1, "%4d/%02d/%02d %02d:%02d:%02d",
|
|
66
|
146 tm.ngx_tm_year, tm.ngx_tm_mon,
|
|
|
147 tm.ngx_tm_mday, tm.ngx_tm_hour,
|
|
|
148 tm.ngx_tm_min, tm.ngx_tm_sec);
|
|
0
|
149
|
|
|
150
|
|
280
|
151 p2 = &cached_http_log_time[slot][0];
|
|
0
|
152
|
|
112
|
153 (void) ngx_sprintf(p2, "%02d/%s/%d:%02d:%02d:%02d %c%02d%02d",
|
|
66
|
154 tm.ngx_tm_mday, months[tm.ngx_tm_mon - 1],
|
|
|
155 tm.ngx_tm_year, tm.ngx_tm_hour,
|
|
|
156 tm.ngx_tm_min, tm.ngx_tm_sec,
|
|
112
|
157 tp->gmtoff < 0 ? '-' : '+',
|
|
|
158 ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60));
|
|
0
|
159
|
|
616
|
160 p3 = &cached_http_log_iso8601[slot][0];
|
|
|
161
|
|
|
162 (void) ngx_sprintf(p3, "%4d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
|
|
|
163 tm.ngx_tm_year, tm.ngx_tm_mon,
|
|
|
164 tm.ngx_tm_mday, tm.ngx_tm_hour,
|
|
|
165 tm.ngx_tm_min, tm.ngx_tm_sec,
|
|
|
166 tp->gmtoff < 0 ? '-' : '+',
|
|
|
167 ngx_abs(tp->gmtoff / 60), ngx_abs(tp->gmtoff % 60));
|
|
|
168
|
|
0
|
169
|
|
112
|
170 ngx_memory_barrier();
|
|
0
|
171
|
|
112
|
172 ngx_cached_time = tp;
|
|
|
173 ngx_cached_http_time.data = p0;
|
|
|
174 ngx_cached_err_log_time.data = p1;
|
|
|
175 ngx_cached_http_log_time.data = p2;
|
|
616
|
176 ngx_cached_http_log_iso8601.data = p3;
|
|
112
|
177
|
|
|
178 ngx_unlock(&ngx_time_lock);
|
|
0
|
179 }
|
|
|
180
|
|
|
181
|
|
566
|
182 #if !(NGX_WIN32)
|
|
|
183
|
|
|
184 void
|
|
|
185 ngx_time_sigsafe_update(void)
|
|
|
186 {
|
|
|
187 u_char *p;
|
|
|
188 ngx_tm_t tm;
|
|
|
189 time_t sec;
|
|
|
190 ngx_time_t *tp;
|
|
|
191 struct timeval tv;
|
|
|
192
|
|
|
193 if (!ngx_trylock(&ngx_time_lock)) {
|
|
|
194 return;
|
|
|
195 }
|
|
|
196
|
|
|
197 ngx_gettimeofday(&tv);
|
|
|
198
|
|
|
199 sec = tv.tv_sec;
|
|
|
200
|
|
|
201 tp = &cached_time[slot];
|
|
|
202
|
|
|
203 if (tp->sec == sec) {
|
|
|
204 ngx_unlock(&ngx_time_lock);
|
|
|
205 return;
|
|
|
206 }
|
|
|
207
|
|
|
208 if (slot == NGX_TIME_SLOTS - 1) {
|
|
|
209 slot = 0;
|
|
|
210 } else {
|
|
|
211 slot++;
|
|
|
212 }
|
|
|
213
|
|
684
|
214 tp = &cached_time[slot];
|
|
|
215
|
|
|
216 tp->sec = 0;
|
|
|
217
|
|
566
|
218 ngx_gmtime(sec + cached_gmtoff * 60, &tm);
|
|
|
219
|
|
|
220 p = &cached_err_log_time[slot][0];
|
|
|
221
|
|
|
222 (void) ngx_sprintf(p, "%4d/%02d/%02d %02d:%02d:%02d",
|
|
|
223 tm.ngx_tm_year, tm.ngx_tm_mon,
|
|
|
224 tm.ngx_tm_mday, tm.ngx_tm_hour,
|
|
|
225 tm.ngx_tm_min, tm.ngx_tm_sec);
|
|
|
226
|
|
|
227 ngx_memory_barrier();
|
|
|
228
|
|
|
229 ngx_cached_err_log_time.data = p;
|
|
|
230
|
|
|
231 ngx_unlock(&ngx_time_lock);
|
|
|
232 }
|
|
|
233
|
|
|
234 #endif
|
|
|
235
|
|
|
236
|
|
50
|
237 u_char *
|
|
|
238 ngx_http_time(u_char *buf, time_t t)
|
|
0
|
239 {
|
|
|
240 ngx_tm_t tm;
|
|
|
241
|
|
|
242 ngx_gmtime(t, &tm);
|
|
|
243
|
|
4
|
244 return ngx_sprintf(buf, "%s, %02d %s %4d %02d:%02d:%02d GMT",
|
|
|
245 week[tm.ngx_tm_wday],
|
|
|
246 tm.ngx_tm_mday,
|
|
|
247 months[tm.ngx_tm_mon - 1],
|
|
|
248 tm.ngx_tm_year,
|
|
|
249 tm.ngx_tm_hour,
|
|
|
250 tm.ngx_tm_min,
|
|
|
251 tm.ngx_tm_sec);
|
|
0
|
252 }
|
|
|
253
|
|
|
254
|
|
50
|
255 u_char *
|
|
|
256 ngx_http_cookie_time(u_char *buf, time_t t)
|
|
0
|
257 {
|
|
|
258 ngx_tm_t tm;
|
|
|
259
|
|
|
260 ngx_gmtime(t, &tm);
|
|
|
261
|
|
|
262 /*
|
|
|
263 * Netscape 3.x does not understand 4-digit years at all and
|
|
|
264 * 2-digit years more than "37"
|
|
|
265 */
|
|
|
266
|
|
4
|
267 return ngx_sprintf(buf,
|
|
|
268 (tm.ngx_tm_year > 2037) ?
|
|
|
269 "%s, %02d-%s-%d %02d:%02d:%02d GMT":
|
|
|
270 "%s, %02d-%s-%02d %02d:%02d:%02d GMT",
|
|
|
271 week[tm.ngx_tm_wday],
|
|
|
272 tm.ngx_tm_mday,
|
|
|
273 months[tm.ngx_tm_mon - 1],
|
|
|
274 (tm.ngx_tm_year > 2037) ? tm.ngx_tm_year:
|
|
|
275 tm.ngx_tm_year % 100,
|
|
|
276 tm.ngx_tm_hour,
|
|
|
277 tm.ngx_tm_min,
|
|
|
278 tm.ngx_tm_sec);
|
|
0
|
279 }
|
|
|
280
|
|
|
281
|
|
50
|
282 void
|
|
|
283 ngx_gmtime(time_t t, ngx_tm_t *tp)
|
|
0
|
284 {
|
|
372
|
285 ngx_int_t yday;
|
|
|
286 ngx_uint_t n, sec, min, hour, mday, mon, year, wday, days, leap;
|
|
0
|
287
|
|
364
|
288 /* the calculation is valid for positive time_t only */
|
|
372
|
289
|
|
364
|
290 n = (ngx_uint_t) t;
|
|
|
291
|
|
|
292 days = n / 86400;
|
|
0
|
293
|
|
664
|
294 /* January 1, 1970 was Thursday */
|
|
372
|
295
|
|
0
|
296 wday = (4 + days) % 7;
|
|
|
297
|
|
364
|
298 n %= 86400;
|
|
|
299 hour = n / 3600;
|
|
|
300 n %= 3600;
|
|
|
301 min = n / 60;
|
|
|
302 sec = n % 60;
|
|
0
|
303
|
|
372
|
304 /*
|
|
|
305 * the algorithm based on Gauss' formula,
|
|
|
306 * see src/http/ngx_http_parse_time.c
|
|
|
307 */
|
|
0
|
308
|
|
372
|
309 /* days since March 1, 1 BC */
|
|
0
|
310 days = days - (31 + 28) + 719527;
|
|
|
311
|
|
372
|
312 /*
|
|
|
313 * The "days" should be adjusted to 1 only, however, some March 1st's go
|
|
|
314 * to previous year, so we adjust them to 2. This causes also shift of the
|
|
670
|
315 * last February days to next year, but we catch the case when "yday"
|
|
372
|
316 * becomes negative.
|
|
|
317 */
|
|
|
318
|
|
|
319 year = (days + 2) * 400 / (365 * 400 + 100 - 4 + 1);
|
|
|
320
|
|
0
|
321 yday = days - (365 * year + year / 4 - year / 100 + year / 400);
|
|
|
322
|
|
372
|
323 if (yday < 0) {
|
|
|
324 leap = (year % 4 == 0) && (year % 100 || (year % 400 == 0));
|
|
|
325 yday = 365 + leap + yday;
|
|
|
326 year--;
|
|
|
327 }
|
|
0
|
328
|
|
372
|
329 /*
|
|
|
330 * The empirical formula that maps "yday" to month.
|
|
|
331 * There are at least 10 variants, some of them are:
|
|
|
332 * mon = (yday + 31) * 15 / 459
|
|
|
333 * mon = (yday + 31) * 17 / 520
|
|
|
334 * mon = (yday + 31) * 20 / 612
|
|
|
335 */
|
|
|
336
|
|
|
337 mon = (yday + 31) * 10 / 306;
|
|
|
338
|
|
|
339 /* the Gauss' formula that evaluates days before the month */
|
|
|
340
|
|
|
341 mday = yday - (367 * mon / 12 - 30) + 1;
|
|
0
|
342
|
|
|
343 if (yday >= 306) {
|
|
|
344
|
|
372
|
345 year++;
|
|
|
346 mon -= 10;
|
|
|
347
|
|
0
|
348 /*
|
|
|
349 * there is no "yday" in Win32 SYSTEMTIME
|
|
|
350 *
|
|
|
351 * yday -= 306;
|
|
|
352 */
|
|
|
353
|
|
372
|
354 } else {
|
|
0
|
355
|
|
372
|
356 mon += 2;
|
|
0
|
357
|
|
372
|
358 /*
|
|
|
359 * there is no "yday" in Win32 SYSTEMTIME
|
|
|
360 *
|
|
|
361 * yday += 31 + 28 + leap;
|
|
|
362 */
|
|
0
|
363 }
|
|
|
364
|
|
|
365 tp->ngx_tm_sec = (ngx_tm_sec_t) sec;
|
|
|
366 tp->ngx_tm_min = (ngx_tm_min_t) min;
|
|
|
367 tp->ngx_tm_hour = (ngx_tm_hour_t) hour;
|
|
|
368 tp->ngx_tm_mday = (ngx_tm_mday_t) mday;
|
|
|
369 tp->ngx_tm_mon = (ngx_tm_mon_t) mon;
|
|
|
370 tp->ngx_tm_year = (ngx_tm_year_t) year;
|
|
|
371 tp->ngx_tm_wday = (ngx_tm_wday_t) wday;
|
|
|
372 }
|
|
394
|
373
|
|
|
374
|
|
|
375 time_t
|
|
|
376 ngx_next_time(time_t when)
|
|
|
377 {
|
|
|
378 time_t now, next;
|
|
|
379 struct tm tm;
|
|
|
380
|
|
|
381 now = ngx_time();
|
|
|
382
|
|
|
383 ngx_libc_localtime(now, &tm);
|
|
|
384
|
|
|
385 tm.tm_hour = (int) (when / 3600);
|
|
|
386 when %= 3600;
|
|
|
387 tm.tm_min = (int) (when / 60);
|
|
|
388 tm.tm_sec = (int) (when % 60);
|
|
|
389
|
|
|
390 next = mktime(&tm);
|
|
|
391
|
|
|
392 if (next == -1) {
|
|
|
393 return -1;
|
|
|
394 }
|
|
|
395
|
|
|
396 if (next - now > 0) {
|
|
|
397 return next;
|
|
|
398 }
|
|
|
399
|
|
|
400 tm.tm_mday++;
|
|
|
401
|
|
|
402 /* mktime() should normalize a date (Jan 32, etc) */
|
|
|
403
|
|
|
404 next = mktime(&tm);
|
|
|
405
|
|
|
406 if (next != -1) {
|
|
|
407 return next;
|
|
|
408 }
|
|
|
409
|
|
|
410 return -1;
|
|
|
411 }
|
